An important government intervention to understand and a sometimes controversial topic. You need to know the reasons for privatisation (and counter-arguments for nationalisation) and the short and long-term effects that it can create.
Lots of examples to draw on and use in essays can easily be found. Here are a few:
https://www.theguardian.com/politics/2013/apr/12/privatisation-good-bad-ugly
https://www.theguardian.com/uk-news/2016/aug/30/britain-privatised-railways-going-down-the-toilet
https://weownit.org.uk/privatisation
Econormics 